Amides of d-gluconic acid



Patented Mar. 14, 1933 UNITED STATES RICHARD PASTERNACK AND cnm'roivr. AMMERMAN, or imooxrv n nnw YORK, As-

AT OFF SIGNORS 'ro CHARLES PFIZER & COMPANY," c ise-extr ivnw YORK, R cesium.

TION OF NEW JERSEY No Drawing.

This invention relates to an amideof dgluconic acid and process of preparing same.

It has been found that by reacting pphenetidine with a lactone of d-gluconic acid that d-glucono p-phenetid may be obtained. This compound has not heretofore been known. It is a white crystalline compound having a melting point of 177 C. and is of therapeutic value.

The reaction may be carried out by mixing p-phenetidine and any of the lactones of d-glucom'c acid, in stoichiometric propor tions or with an excess of one or the other, with a solvent such as methyl or'ethyl alcohol and heating the reaction liquid to raise the temperature at least slightly. i. e. about 50 0., to enable the reaction to go forward at a practically feasible speed. Temperatures above 160 (1., which could be attained by carrying out the reaction under pressure,

should be avoided due to the danger of decomposition. The liquid used as a solvent should be a good solvent forat least one of the reactants and should not react with the resulting product. p

The d-glucono delta-lactone and d-glucono gamma-lactone are particularly suited for this reaction, the method of carrying out the reaction and the resulting compound being the same regardless of which lactone is used.

The reaction may also be carried out by heating p-phenetidine and a lactone of dgluconic acid in the absence of any solvent or diluent at about 120 C. but not substantially above 160 C. at which temperature decomposition is apt to occur. The p-phenet- 40 idine and lactone may be reacted in stoichiometric proportions or with an excess of either. The crude d-glucono p-phenetid may then be dissolved in water and crystallized out. The reaction is substantially complete after hour at C. in the AMIDES or n-eLUcoiv-Ic mas. I

Application filed m 19, 1930'. raiser-69364;. I

absenceof, a solventforjafter 10 hours in the presence of, methanol. Y

The, reaction' may be represented as" fol; Iowa-using d glucono' delta lactone as the d-glucono deltalactone p-phenetidine d-glucono p phenetid "The llowing specific examples'are given I to illustrate the invention:

Ema mph I .-1 37 parts p-pheneti' dinei l78 pletion 'd-glucono -phenetid solidifies; 76'

The methanol is then distill ed OE and, the crudephenetid is dissolved in water and recrystall zed-h I Pure d-glucono p-phen'etid is obtainedfas a white crystalline compound 1, 757

melting at 177C. J- v I -Ewample Il. 137 parts p=phenetidine and l87 parts d-glucono gamma-lactone (5% v excess) are heated to 120 C. for hour.

7 During theheatingthe lactone dissolves in the amine veryrapidly, sothat ahomo'g'ene 011s rheltresriltjs, maroon thereafter the rea'ctioi'i product solidifies, The; crude ds, glucono p-plrenetid thus obtained is purified V by recrystallization from alcohol or whitey g5 The invention claimed is: 1. d-glucono p-phenetid,

d'glmn" PPhnetit being we; i e substance'having 'elting Point r 3. A white crystalline substance having a melting poin'tof 177 C. and the formula 4. Process of preparing d-glucono p-phenetid comprising reacting at below 160 C. p-phenetidine and a lactone of d-gluconic is c -y v 5. Process of preparing d-glucono p-phenj etid comprising reacting at below 160 C. p-phenetidine and d-glucono gamma or delta lactone.

6. Process of preparing d-glucono p-phene-' tid comprising reacting p-phenetidine and alactone of d-gluconic acid-at about 120- and below 160 C.- --7; Process ofpreparing d-glucono p-phenetid comprising reacting p-phenetidine and d-glucono gamma or delta lactone at about 120 and below 160 C. e

8. Process of preparing d-glucono p-p hen Y 'etid comprising reacting p-phenetidine and a lactone of d-gluconic acid in the'presence 7 of a solvent for at least one of the reactants V at between 50C. and100 C. ,7

p 9. Process of preparing d-gluoono p -phenetid comprisingreacting p-phenetidine and I d-glucono gamma or delta lactone in the i 71 presence of an alcohol at between 50 C. and

10000 a I k 1() Process of preparing d-glucono rp-' phenetid comprising reacting p-phenetidine 40 and d-glucono gamma. or delta lactone in the presence. of an alcohol, selected 'from the group comprising methyl and ethyl alcohol at not above about 100 C. for several hours.

11. Process of preparing d-glucono 4pphenetid comprising reacting 'p-phenetidlne T and d-glucono gamma or delta laotone in the presence of methanol at; not above 7 about 100 C.'for severalihonrs. V

'12. Process of "preparing d-glucono pphenetid comprising heating a mixture of pphenetidine and a lactone ofd-gluconic acid in the absence of a solvent :until said mixture melts but not substantially above 160 C.- 7 I 13. Process of preparing d-glucono 'p-' phenetid comprising heating a mixture of p-phenetidine and d-glucono' gamma delta lac'tone in the absence of a solvent until said mixture "melts but not substantially 2 above C. r is i j "-7 Signedf at Brooklyn, in the county of Kings and State of New York, this 17th day of July A. D. 1930; I

RICHARD PASTERNACK. 6 5 CLINTON P. ALWEBMAN. I 

